you are with -- >> property in environ research center. john: based in bozeman, montana. you folks city areas where private property can help protect animals. >> we believe that ownership provides the best incentives for conservation. john: most of the buffalo are owned by private ranchers, but there are still ome in state parks or one state park. one has a roundup. >> and they are actually treating their bison most like private ranchers are, making them pay. what they do is once a year for 45 years they have this huge round with a bring in their 1500 bison. tourists come from all over the world among pay money to watch these bison get heard it, and all wild west fashion with cowboys and cowgirls, and the bison come sweeping down the planes. e earth shakes. they did move in the corrals, and we all go eat bison murders after words. the point is, the park is making money from the tourism. then about a month later they auction off a portion to private ranchers and they're also making money now wait. all that money goes back into custer state park to pay for operations of the